TM 10-3950-672-10
NOTE
If there is a hydraulic power failure, the crane can still be steered, because the steering
control valve acts as a pump when the steering wheel is turned. However, steering in this
manner is very difficult. If this failure should occur, immediately bring the crane to a safe
stop and proceed with immediate repairs or replacement.
5-3.6 General Crane Operation. The control lever operation for crane functions is standard, i.e., the closer the lever
is to neutral (center), the slower the system responds. This applies to both forward and rear movement of the applicable
lever. The control lever should be returned to neutral to hold the load.
CAUTION
Never feather the hoist control to hold the load.
NOTE
Always operate the control lever with slow, even pressure.
5-3.7 Functional Check. After the crane has been readied for service, a functional check of all craning functions (with
no load applied) should be performed.
WARNING
Carefully read and become familiar with all crane operating instructions before attempting to
operate the crane.
a. Operate the engine at or near the governed RPM during performance of all crane functions.
b. Extend and set the outriggers. Refer to paragraph 5-3.9.
c. Raise, lower, and swing the boom right and left a minimum of 45 degrees. Refer to paragraphs 5-3.11, 5-
d. Telescope the boom in and out. Refer to paragraphs 5-3.14 and 5-3-15.
e. Raise and lower the hoist cable a few times at various boom lengths. Check for kinks in the cable. Refer
to paragraphs 5-3.16 and 5-3.17.
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